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Influence of the substrate on the overall sensor impedance of planar H<sub>2</sub> sensors involving TiO<sub>2</sub>–SnO<sub>2</sub> interfaces

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Figure 4. One-dimensional approximation of basis cell of an IDE- IDE-based gas sensor (type B) (Fischerauer et al., 2011).
Figure 8. Time series of the inflexion frequency f B and the tem- tem-perature as measured with a thermocouple inside the measurement chamber.
Figure 9. Measured type-B sensor impedance Z(Z T , Z S,B , Z a ) in various atmospheres
Figure 10. Measured impedances of a type-B sensor (squares) and a type-C sensor (circles)

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